#VU119110 Input validation error in envoy - CVE-2025-64527

CSH
CYBERSECURITY HELP
Sign In REGISTER
 
Main Vulnerability Database Vulnerabilities #VU119110

#VU119110 Input validation error in envoy - CVE-2025-64527

Published: December 3, 2025


Vulnerability identifier: #VU119110
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2025-64527
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
envoy
Software vendor:
Cloud Native Computing Foundation

Description

The vulnerability allows a remote user to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input in the JwksFetcherImpl. A remote user can send a specially crafted request to the application and perform a denial of service (DoS) attack.

The vulnerability requires that JWT authentication is configured with the remote JWKS fetching, allow_missing_or_failed is enabled, multiple JWT tokens are present in the request headers and the JWKS fetch fails.


Remediation

Install updates from vendor's website.

External links